Now Foods | Arginine & Citrulline 500MG / 250MG | 120 Veg Capsules

Protein Metabolism Muscle Maintenance Arginine and citrulline are two amino acids that are integral to protein metabolism and utilization, as well as to the maintenance of muscle tissue. Both are key intermediates in the urea cycle, where they participate in the detoxification of ammonia via the production of urea.